My community tank features higher light plants at one end and mostly lower light plants at the other. The LED light bar is adjusted so it's centered over the right hand 2/3rds of the tank and I've got a screen covered piece of glass that helps dim the light on a small strip across the far left side.
Used to just use floaters to try and get the same affect, but they're bloody hard to keep corralled. Happily, I discovered the glass canopy for a 2.5g standard tank fits perfectly across my 37g tall--glued down window screen and it's ready to slide into place to keep my java fern and anubia just that little bit less lit.
Not the usual look, but I like the extra dimension it adds.
Last edited by Knotyoureality; 01-30-2013 at 10:03 PM.